Genetic Component of Yield and Other Desirable Traits in Kitale Mize Composite-C
1994
Legese Wolde
Eleven randomly selected KCC maize inbred lines were diallel and topcrossed. Results of random and fixed model showed significant different of GCA and SCA for most traits. SCA had more influence in determining characters such as grain yield, ears per plant and ear length. In the combined analysis, the significance of GCA and SCA suggested the role of additive and non-additive gene actions in conditioning several agronomic characters among KCC inbred lines. From the estimates of the magnitude of genetic variance in the pooled data, additive gene effects were identified to be more important for 100 seed weight, kernel row number, number of leaves per plant, maturity and stalk lodging than dominance gene effects. For grain yield, ear diameter, ear length, plant and ear height, tasseling, silking and root lodging, the magnitudes of dominance genetic variance were the major components. Traits conditioned by additive gene effects can be improved by mass or family selection procedures. For the rest of the characters, method of selection that capitalize on dominance genetic variance would have to be implemented in order to improve KCC maize population. General combining ability effects of parental lines for traits considered in this study were generally non-significant
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